Every collector knows the launch pattern by feel: chase cards spike on release weekend, then bleed as supply reaches the market. Feel is not a strategy. We took every set launched in the last eighteen months — nine sets, roughly a hundred top chase cards, plus each set's total value — and measured the actual curve, day by day, normalized to each card's launch-window peak. Three findings replace the folklore: the trough is at month SEVEN, not week two; the decay is the default path that reprint announcements merely confirm; and by day 90 the market has already told you — every time in this cohort — whether a set will be a slider or a keeper.
The real curve: a slow grind to a month-seven bottom
The cohort median says a set's top chases give back 15% in the first month, about a fifth by day 90, a third by six months, and bottom out around 56% of their launch peak at a median of 224 days — seven and a half months after release. That long grind is the supply schedule made visible: launch allocation sells through in days, but print waves keep arriving for months (the print clock's restock cadence), and the bottom forms only when the era's presses move on. Then the wind-down bid starts: of the seven sets old enough to have troughed, most have recovered meaningfully from the bottom — Prismatic's chases from 56% back to 94% of launch, White Flare from 72% to 106%, Black Bolt from 84% to 128%.
The cohort launch curve — chase cards, median of nine sets
Every launch curve we hold — chase-card medians vs launch peak
| Set | Released | Day 30 | Day 90 | Day 180 | Trough (day) | Today |
|---|---|---|---|---|---|---|
| Prismatic Evolutions | Jan 2025 | 1.05 | 1.16 | 0.68 | 0.56 (378) | 0.94 |
| Journey Together | Mar 2025 | 0.81 | 0.61 | 0.60 | 0.42 (301) | 0.50 |
| Destined Rivals | May 2025 | 1.01 | 1.05 | 0.94 | 0.81 (224) | 1.09 |
| Black Bolt | Jul 2025 | 0.88 | 1.01 | 0.88 | 0.84 (42) | 1.28 |
| White Flare | Jul 2025 | 0.92 | 0.94 | 0.74 | 0.72 (210) | 1.06 |
| Mega Evolution | Sep 2025 | 0.79 | 0.56 | 0.55 | 0.49 (126) | 0.60 |
| Phantasmal Flames | Nov 2025 | 0.70 | 0.61 | 0.58 | 0.52 (245) | 0.53 |
| Perfect Order | Mar 2026 | 0.85 | 0.68 | — | 0.58 (112) | 0.59 |
| Chaos Rising | May 2026 | 0.65 | — | — | 0.46 (56) | 0.47 |
Day 90 tells you which curve you're on
The dispersion between sets is enormous — and it announces itself early. Every set in this cohort whose chases still held roughly their full launch value at day 90 (Destined Rivals at 1.05, Black Bolt at 1.01, Prismatic at 1.16) went on to trade at or above launch a year later. Every set below 70% at day 90 (Journey Together 0.61, Mega Evolution 0.56, Phantasmal Flames 0.61) stayed depressed through every later checkpoint. Total set value tells the same story: day-90 set value at or above launch preceded year-one set values of 1.04× to 1.53×; day-90 under 0.7 never got back inside our window. One honest caveat: Prismatic passed the day-90 test and STILL fell 44% mid-life before recovering — a launch baseline set during full market mania can defeat any classifier. The rule is a strong prior, not a law.
Total SET value: day-90 vs a year later
| Set | Set value day 90 | Day 365 | Today | Verdict |
|---|---|---|---|---|
| Black Bolt | 1.01 | 1.53 | 1.53 | Keeper — flagged by day 90 |
| Destined Rivals | 1.01 | 1.15 | 1.04 | Keeper — flagged by day 90 |
| Prismatic Evolutions | 0.98 | 0.51 | 0.75 | Keeper w/ mania detour |
| White Flare | 0.83 | 1.23 | 1.23 | Late bloomer |
| Phantasmal Flames | 0.68 | — | 0.74 | Slider so far |
| Journey Together | 0.60 | 0.51 | 0.54 | Slider — flagged by day 90 |
| Mega Evolution | 0.53 | — | 0.53 | Slider — flagged by day 90 |
Where each current set sits on the curve right now
Phantasmal Flames is the textbook setup: its chases sit at 53% of launch on day 256 — statistically AT the cohort trough, inside the historical month-6-to-9 accumulation window — while its SEALED product simultaneously trades at 3.1× retail because the presses can't keep up. Singles at the trough with supply-constrained sealed is the divergence a reprint resolves in the buyer's favor: reprints refill packs, not the singles market's confidence. Mega Evolution at 60% on day 305 is just past its trough with the era still current. Chaos Rising at 47% on day 67 is EARLY — the curve says the next four months historically grind sideways-to-down; there is no rush. And the standing rule the curve enforces: the best sell window for launch chases is launch itself — the cohort has never paid you to hold week-one prices into month six unless day 90 already flagged a keeper.
The curve's current cast
Cohort: all nine sets released January 2025 – July 2026 (official release dates), each represented by its top 8–12 chase cards by current price with daily Near Mint market-price history from release. Each card's series is normalized to its launch-window peak (maximum of days 0–14); per-set curves are cross-card medians at weekly checkpoints; the cohort curve is the cross-set median (day-365 figures use only sets old enough, n=3). Total set value uses our daily set-value series normalized to the first-30-day peak. Younger sets' checkpoints are marked — where a set hasn't reached a checkpoint no value is shown. Day-90 classifier is descriptive of this cohort (n=7 with outcomes), with the Prismatic mania-baseline exception disclosed; it is a prior, not a guarantee. Figures as of July 28, 2026; linked pages price live. Nothing here is financial advice.